This is no ordinary book. It is a set of probing questions (1,450 in fact) designed to help individuals or groups, especially groups, to dive deeply into Saint John’s Gospel. No answers are provided, but the questions are phrased in such a way as to set a person in a reliable direction for finding the answers.

The questions correspond to the verses of the Gospel and require active and personal interaction. Some of the questions are easy, some difficult, and they are marked accordingly. Some questions include background information or hints that help the reader along. Some were written with a fair bit of humor. Any person or group using these questions to explore John will find themselves entertained as well as informed and inspired.

"Combine the brilliant mind of Peter Kreeft with the richness of Saint John's Gospel, and you have a dynamic study full of intrigue, new horizons, and new depths, which make the Bible come alive. This is no average Bible study. Probes forces you to engage the text, think below the surface, and make the discoveries yourself."
— Steve Ray, Author, St. John's Gospel: A Bible Study Guide and Commentary

"Peter Kreeft undertakes an original and provocative approach to the Gospel of Saint John. Rather than interpreting the text through modern Biblical scholarship, Kreeft poses probing questions that emerge from the Gospel, opening the reader to a deeper personal encounter with God. For those eager to engage their intellect prayerfully, this 'deep sea dive' into John's Gospel promises to yield rich spiritual treasure."
— Alan Schreck, Professor of Theology, Franciscan University of Steubenville